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EN 1.7390 Steel vs. EN 1.4903 Stainless Steel

Both EN 1.7390 steel and EN 1.4903 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.7390 steel and the bottom bar is EN 1.4903 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
20 to 21
Fatigue Strength, MPa 310
320 to 330
Impact Strength: V-Notched Charpy, J 46
42 to 46
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Shear Strength, MPa 440
420
Tensile Strength: Ultimate (UTS), MPa 710
670 to 680
Tensile Strength: Yield (Proof), MPa 480
500

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 510
650
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
26
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
4.0

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
2.6
Embodied Energy, MJ/kg 23
36
Embodied Water, L/kg 69
88

Common Calculations

PREN (Pitting Resistance) 6.8
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 600
650
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
24
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 11
7.0
Thermal Shock Resistance, points 20
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0 to 0.18
0.080 to 0.12
Chromium (Cr), % 4.0 to 6.0
8.0 to 9.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 91.9 to 95.3
87.1 to 90.5
Manganese (Mn), % 0.3 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0.45 to 0.65
0.85 to 1.1
Nickel (Ni), % 0
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0
0.18 to 0.25